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Stripped sparkplug "Help" 3.4l

Discussion in '1st Gen. Tacomas (1995-2004)' started by EMT0003, Nov 22, 2015.

  1. Nov 22, 2015 at 2:59 PM
    #1
    EMT0003

    EMT0003 [OP] Member

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    Need help asap to get my taco back up and going.
    Just bought it a few months ago, the only thing I never pulled and checked was the plugs. Appears the plug was left loose bc trucks started running bad. I noticed the coil pack shaking when it was running. Onc3 pulled the plug was loose. No threads left in head (see attached pic. I purchased a tap and insert kit at auto zone (not a heli-coil coil). My problem is the socket that fits the tap (19mm) will not fit on the spark plug hole. Any suggestions other than replacing the head.

    20151119_161003.jpg
     
  2. Nov 22, 2015 at 5:45 PM
    #2
    jdob

    jdob Well-Known Member

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    May need to pull the head and bring it to a machine shop. I'm sure there are tools and someone with the skill to fix your head.
     
  3. Nov 22, 2015 at 6:41 PM
    #3
    CStoy

    CStoy mountain-top maniac.

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    i think its time for the pro's! ouch.

    had this problem x2(2 different plugs) on a 01 ford 5.4 before i replaced the head entirely. it was a nightmare...ended up redoing the plug size to that of a 06 5.4 with a slimsert. works ok. but not ideal.

    never done it on a taco but i have replaced the plugs and know the holes are smaller than the ford...good luck.

    edit; timesert not slimsert and only cause i know a mechanic really well. its a very expensive kit. if not i would have used helicoil...
     
    Last edited: Nov 22, 2015
  4. Nov 22, 2015 at 6:59 PM
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    CodeSeven

    CodeSeven Yo

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    so long as you get all the shavings out of the head afterwards, you can use a helicoil kit to fix it. you need to use red threadlocker on the final installation of the insert. the threading tool has a slot for a 3/8 extension to fit in, so you don't have to worry about something not fitting, just make sure it goes in straight.

    and I believe the thread inserting tool also has something similar. if not, you can always put the thread insert onto a spark plug and install it while attached to a spark plug. again, just make sure it goes in straight. that's all you're doing with their installation tool.

    but I can't stress this enough, MAKE SURE YOU GET ALL METAL SHAVINGS OUT OF THE CYLINDER BEFORE TURNING IT! you can usually just get a blow gun way in there and blow it out. if anything does manage to stay in there, it will most likely blow out the exhaust

    you can even just take the head off and do it that way. you don't have to take it to a machine shop for the re-threadding. but you may still want to take it there for a resurface and pressure/bench test to make sure everything is working otherwise.

    good luck!
     
  5. Nov 23, 2015 at 5:32 AM
    #5
    EMT0003

    EMT0003 [OP] Member

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    I'm trying to stay away from heli-coil bc you have that large tab that you use to insert it with that has to be broken off, I'd assume that would not be as easy to remove from the cylinder. As far as pulling the head, in trying to avoid that due to time restraints. Yes this for me will be a temporary fix I plan on pulling the head down the road (Mayne this summer) and replacing it.
     
  6. Nov 23, 2015 at 2:33 PM
    #6
    devinzz1

    devinzz1 Well-Known Member

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    That little tab is least of your worries after you drill and retap the head.
     
    rzgkane likes this.
  7. Nov 23, 2015 at 3:58 PM
    #7
    EMT0003

    EMT0003 [OP] Member

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    Well actually the heli-coil it's self would be my main concern bc they are not as strong and reliable hence as to why I'm going with a thread insert.
    Yet my question still remains on socket for tap is too large to fit in the spark plug tube...
    Maybe I will weld and ext to the tap and be done with it.
     
  8. Nov 23, 2015 at 4:10 PM
    #8
    rzgkane

    rzgkane Well-Known Member

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    Amen. Either pull the head or pray. No way you are drilling, tapping and inserting that hole and getting all the shavings out. You will ruin surface of the cylinder in 10 minutes of running IMHO.
     
  9. Nov 23, 2015 at 4:15 PM
    #9
    murderedtaco23

    murderedtaco23 Well-Known Member

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    I would pull the head no matter what you end up doing, Id hate to "fix the problem" and then ruin it because I didn't a few shavings out. My.02
     
  10. Nov 23, 2015 at 9:35 PM
    #10
    thefatkid

    thefatkid Well-Known Member

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    I use this guy for all of my spark plug thread repairs. Tap drivers fit in the plug tube without issue. Prior to 1st start I use a very long blow gun that can touch the piston (position the engine rotation to where the exhaust valves are open on that cylinder) to blow out most of the shavings. If you have a bore scope check your work. Then start it up. The shavings are generally small enough that they all go out of the exhaust.

    http://www.amazon.com/TIME-SERT-1-25-Spark-Repair-4412/dp/B0025NL1V2
     
  11. Nov 24, 2015 at 5:54 AM
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    CStoy

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    thats the one i mentioned...a very good kit.

    i also had a brain storm...if you have a dremmel-grinder-circsaw with a metal blade, you could cut a groove across the top of the tap and use a large screwdriver and some vice-grips to turn it...i dont recomend this but it may work...
     
  12. Nov 24, 2015 at 6:28 AM
    #12
    devinzz1

    devinzz1 Well-Known Member

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    In alot of cases
    [OTE="CStoy, post: 11220429, member: 157225"]thats the one i mentioned...a very good kit.

    i also had a brain storm...if you have a dremmel-grinder-circsaw with a metal blade, you could cut a groove across the top of the tap and use a large screwdriver and some vice-grips to turn it...i dont recomend this but it may work...[/QUOTE]

    Or find a socket that fits snug...
     
  13. Nov 25, 2015 at 12:18 PM
    #13
    EMT0003

    EMT0003 [OP] Member

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    Ok, so here is where I'm at right now. I've welded a hex bolt to the tap and welded a nut on the end. I'm not so concerned with shavings, I'm going to use grease on my tap. Shop vac with a 1/4" hose to reach inside the cylinder, diesel to wash out cylinder then vac out and lastly blow out cylinder with compressor. Let's see how this goes. 20151125_150416.jpg
     
  14. Nov 25, 2015 at 2:15 PM
    #14
    Caligula

    Caligula It's the COVFEFE

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    +1

    You are going to have to go the helicoil or timesert route in order to make a proper repair. Anything less will result you causing more damage to the head. There is high chance of getting shavings and metallic bits in the cylinder, especially with timeserts. Because of that, i would pull the head.

    Be wary of anything purchased from autozone or the like, they only stock inferior products.
     
  15. Nov 25, 2015 at 3:59 PM
    #15
    blaib

    blaib Active Member

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    Your repair will be fine if you do it correctly. I have a shop and I actually did one today that someone did not get tight enough and it blew the threads out. I have done several of them with the Sav-A_thread kit you are about to use.
     
  16. Nov 26, 2015 at 7:47 AM
    #16
    CodeSeven

    CodeSeven Yo

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    :facepalm:the heli-coil kit i linked isn't the insert type that breaks a tab on install.... it's an actual threaded insert.

    And the tap that it comes with has a square hole for a 3/8ths drive extension. And unless you welded that bolt absolutely 100% perfectly straight onto the tap, you're going to fubar your hole and new threads.

    Dont use that tool. Youre going to try to turn and push that thing in straight but it wont go cause it's not a straight tool to begin with. and as you try to keep it straight, it's going to cut the hole bigger than it'ssupposed to be.

    Buy the tool that I linked. It was designed to be a perfect fit and cut while loosely inserted using a 3/8ths ratchet and extension.
     
    Last edited: Nov 26, 2015
  17. Nov 26, 2015 at 8:22 AM
    #17
    CStoy

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    sounds like youve got the right idea... go slow and be extra careful... i would do the shop-vac and the blower before the deisel as the deisel will cause the shavings to stick to the inside walls a little...it may be a good idea tho for a final rinse.
     
  18. Nov 26, 2015 at 11:28 AM
    #18
    Caligula

    Caligula It's the COVFEFE

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    What is this thinking a shop vac or air compressor is going to do anything but spread the bits around and probably press them against the cylinder. Its so nice to see people ruining cylinder linings with "aww its fine" workmanship.

    ^^^^^^ this

    If you want to be OCD like me, pull the head and install a timesert. Otherwise he has the right idea.
     
  19. Nov 26, 2015 at 12:38 PM
    #19
    jdob

    jdob Well-Known Member

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    I think this is one of those issues where you try to save time and money by doing a temp fix that bites you in the butt and only ends up costing you more. Think long and hard before you start to tap. Either way, good luck.
     
  20. Nov 26, 2015 at 10:21 PM
    #20
    thefatkid

    thefatkid Well-Known Member

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    How much engine experience do you have working on Toyota vehicles? How many repairs like this have you completed?
     
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